For more than a century, astronomers have known that some “new stars” flaring into view are not births at all but violent ...

Astronomers have uncovered a new extreme in the universe's catalog of violent phenomena — a class of cosmic explosions so powerful that they rank among the most energetic events since the Big Bang.

An active region on the Sun, AR1515, has been putting on quite a show over the last 8 days, sending out all sorts of solar flares. Scientists were sure the huge sunspot was building up to produce an X ...